On division subrings normalized by almost subnormal subgroups in division rings

Trinh Thanh Deo, Mai Hoang Bien, Bui Xuan Hai

Let $D$ be a division ring with infinite center, $K$ a proper division subring of $D$ and $N$ an almost subnormal subgroup of the multiplicative group $D^{\ast }$ of $D$. The aim of this…